Tool for double-stage furnaces



y 14, 1929- 0. H. BUSE ET AL 1,713,418 I TOOL FOR DOUBLE STAGE FURNACES Filed June 21. 1928 2 Sheets-Sheet. 2

Patented May 14, 1929.

UNITED-STATES 1,713,418. PATENT OFFICE.

OTTO H. BUSE, OF SHAKER HEIGHTS, AND RUSSELL R. REID, OF OHIO,

ASSIGNORS, BY MESNE ASSIGNMENTS, OF CLEVELAND, OHIO, ACORPORATION F DELAWAR TO THE GRASSELLI CHEMICAL COMPANY,

TOOL FOR DOUBLE-STAGE FURNACES.

Application filed June 21,

The present invention relates to tools for s treatment (e. g., common salt) is initially re-- acted with a fluid reagent (e. g., sulfuric acid) in the pot at an elevated temperature, the resulting pasty, partially-reacted mass is transferred to and spread in a thin layer upon the hearth and is there subjected to a baking operation,usually with stirring,for the continuance and completion of the reaction. In the ordinary double-stage furnace the operations of transferring the said initial reaction product from pot to hearth, and of spreading and otherwise working the mass .on the hearth, are carried out by hand, re-

quiring therefor skilled operators. The rela-.

tively large dimensions of the ordinary handoperated furnaces necessitate the use of heavy points of the furnace.

An object of the present invention is to provide va mechanically operated tool for i scraping the partially reacted mass from the pot and onto the hearthof the ,above-described double-stage furnace,,and for spreadingthe said mass in an even layer upon and otherwise working the same over the said hearth. Another object is to provide a tool of the above-described character which is automatic 1 in action, yet one which is rugged and simple and not easily deranged. r 8 These and other objects will be apparent from the following description, taken in con I nection with the accompanying drawings,

wherein i Fig. 1 is a side view of the scraping and spreading tool;-

Fig. 2 shows one part of the tool, with parts .broken away, 7 Fig. 3 is a top-plan of the tool,

Fig. 4 is a section on line 4-4 of F 1g. 1,

hand tools of sufficient length to reach all 1928. Serial No. 287,237.

, positions in a double stage furnace.

Referring to the drawings, our tool includes a handle portion 1 having secured to one end thereof a socket member 2. This socket 2 has a rectangular opening? extendmg longitudinally thereof, and havin its upper wall cut away as clearly seen in Flg. 2. The lower wall of socket member 2 has an opening 4 therein, and said member terminates in an upwardly curved end 5.

The side walls of socket'2 have slots 6 therein for slidably receiving a pivot pin '7, which pin supports a ba.r 8. .The bar 8 has a teetangular end 9 for its reception in rectangular opening 3 in socket 2, whereby bar 8may besupported parallel to handle portion 1- when part 9 is In opening 3, as seen in dotted lines in Fig. 2.- v

Bar 8 curves upwardlyand forwardly and terminates at its other end in a downwardly projecting pron 10. A cross bar 11 is secured to bar 8 a jacent prong 10 and carries two prongs 12 which are similar to prong 10, the construction thus forming a rake.

Pivoted at 14 to the bar 8 adjacent the rake end thereof is a scoop 13 having side arms 13. This scoop is adapted-to be raised and lowered by mechanism including. lever 15 pivotally secured thereto which in turn is pivoted to crank arm 16. Crank arm 16 is pivoted to bar 8 at 17 and is connected by a link 18 to a bell crank lever. 19, said bell crank being pivoted to bar 8 adjacent the end 9 thereof. The end 20 of bell crank 19 rests against the upper surface of sleeve 2 and is adapted to ride up on a cam surface 21 on said sleeve when rod 8 slides to the left of sleeve 2, to the position shown in dotted lines in Fig. 2. t

Theoperation of our tool is as follows, ref erence beinghad to Figs. 5, 6, 7, and 8 wherein the tool is shown in'conjunction with a double stage furnace having a reaction pot 22 and a hearth 23. The tool is introduced into the furnace from the hearth side thereof, as'seen in F ig.'5, the end 9 of rod 8 being engaged into the opening 3 of sleeve 2. In this position, the scraper and associated parts cannot rotate about pin 7 butareheld substantially horizontal. -The end 20 of bell crank 19rides up onto cam surface 21 to tive longitudinal Fig.v 1, thus raising scoop 13 by means of lever 16.

When the end of the tool reaches the far side of the pot, that is, the position shown in Fig. 6, the operator thereof starts to pull the same toward him. The frictional engagement of the rake prongs and 12 with the pot and the materials therein causes a relamovement of the bar8 with respect to sleeve 2, such that the end 9 is withdrawn from opening 3, the pin 7 sliding in slots 6 of sleeve 2. The bar 8 with its scoop and rake portions is then free to drop down and follow the contour of the pot'22 as the tool is withdrawmas seen in Fig. 7

When the bar 8 with the rectangular part 9 thus movesrelative to sleeve 2, the part 20 of bell-crank- 19 moves off; the cam surface 21 and the system of levers 19, 18, and 15 allows scoop 1-3 to lower to thereby pull the material out of pot 22 and up on to the hearth 23. As the entire arm 8 and its associated parts move from the position as seen in Fig.

- 6 to thatZ'as seen in Fig. 7 it will be noted that links15 and 16 approach a straight line to thereby allow scoop 13 to be lowered with respect to rake prongs 10 and 1'2,'thus being enabled to move closely adjacent to the sur- 7 face of the pot to remove the material therefrom. Y 7

When the rake prongs ride up on the adjacent hearth surface 23, arm 8 is returned to a horizontal position and the scoop 18 is thereby raised. This is: for the purpose of evenly spreading the 'materialscooped from the pot over the'hearth 23. In one form of this invention the scoop" is raised about 2 inches above the hearth 23 to thus evenly spread alayer of material about 2 inches thick. It will be understood, of course, that the clearance between the scoop and hearth may be suitably varied by a change in length of the various levers. V

The rakeprongs 10 and 12 the material as it is spread over the hearth.

It will be understood that the tool as de scribed may be operated by hand or by mechanical, electrical, or any other suitable means. One form of mechanical operating means is disclosed in the Patent 1,561,054: granted to Otto Buse, November 10, 1925.

It will be understood that the invention is not limited to the specific embodiment as shown, but only in so far as is set forth in the'accompanying claims.

,We'claim: I p

1. Ina double-stagefurnackg, having a reaction pot and a hearth at approximately the same horizontal level, a tool for working the charge, thereoi including a handle-portion, a scoop connected to said handle portion, and

a support for said scoop being adapted-to engage the surfaces of said pot and said hearth when said tool is being moved outwardly, the

act to break up action pot and a hearth at approximately the same horizontal level, a tool for working the charge thereof including a handle portion, a rake and scoop connected to said handle portion, said rake acting as asupport for said scoop to allow said scoop to move closely adj acent said pot when said tool is moved outwardly of said pot, and to maintain said scoop at a greater distance from said hearth.

3. A tool for use in a double-stage furnace comprising a handle, a scoop-carrying member pivoted to saidhandle, said pivotal connection allowing limited relative longitudinal movement between said handle and member and means to maintain said member in horizontal alignment with said handle when said tool is moved in one: direct-ion and to allow said member to swing. about said piv otal connection when said tool is moved in the reverse direction. i I

4. The structure as in claim 3 wherein the said means comprises a rectangular socket and a cooperating rectangular rod adapted to be received in said socket. i

' 5. A tool for use in a double-stage furnace comprising a handle, a rod pivoted adjacent one of its ends to said handle'and having a scoop pivoted thereto adjacent its'other end, the pivotal connection between said handle and said'rod allowing limited relative longitudinal movement betweensaid handle and said rod, and means connected to said scoop to hold the same in raised position during movement of said tool in one direction.

6. The structure as in claim 5, wherein the said means is dependent upon'the relative longitudinal positions of said handle and said member. j

7. The structure as in claim 5, wherein the said means includes a cam surface on" said handle and acooperating lever on saidmember havinga portion for engagement with said cam surface. I

8. The'structure as in claim 5, wherein the said handle and the said member are provided with cooperating means to maintain said member in horizontal alignment with said handle upon movement of the tool in one direction and-to allow said member to swing about its pivotal connection upon movement of said tool in the reverse direction.

'9. A tool for use ina double-stage furnace comprising a handle, a socket secured thereto and having a rectangular opening therein a rod pivoted to said socket and having'limited longitudinal movement with respect to said socket, said rodha-ving a rectangular end for engagement in the rectangular opening of said socket to thereby maintain said handle and said rod in horizontal alignment, the said rod terminating in rake fingers, a scoop pivoted to said rod adjacent said rake fingers, linkage mechanism pivoted to said scoop and having a bell-crank lever pivoted to said rod adjacent to said socket, said bell-crank lever having one end normally engaging the upper surface of said socket, and a cam on the upper surface of said socket for engagement by the said end of the bell-crank lever to thereby raise the said scoop when the said 1 rod is held in horizontal alignment with said handle. In testimony whereof, we aflix our signatures.

OTTO H. BUSE. RUSSELL R. REID. 

